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BÀI TẬP TRẮC NGHIỆM HÓA ĐẠI CƯƠNG VÀ VÔ CƠ CẨM NANG DÙNG LUYỆN THI THPTQG CHẤT LƯỢNG CAO (COLOR BOOK)

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63 65<br />

Cu vµ Cu.<br />

63 Cu<br />

(A) 27 %. (B) 50 %. (C) 54 %. (D) 73 %.<br />

là<br />

65 Cu<br />

63 Cu.<br />

là 100 – x.<br />

63.x 65.(100 x)<br />

ACu<br />

63,54<br />

100<br />

37<br />

17 Cl<br />

37<br />

trong HClO 4 là<br />

35<br />

17 Cl.<br />

(A) 8,43 %. (B) 8,79 %.<br />

(C) 8,92 %. (D) 8,56 %.<br />

17 Cl Cl<br />

– Trong 1 mol HClO 4 có 1 mol clo.<br />

35.75,77 37.24,23<br />

A 35, 48.<br />

100<br />

4:<br />

MHClO 1 35, 48 16.4 100, 48 (gam/mol).<br />

4<br />

Chú ý<br />

37<br />

Cl 24,3<br />

17<br />

là .1 0,2423 (mol).<br />

100<br />

37<br />

là 37.0,2423 = 8,9651 (gam).<br />

17 Cl 37<br />

17 Cl<br />

8,9651 .100% 8,92 %.<br />

100, 48<br />

trong HClO 4 là<br />

4<br />

22

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